Jointing

Joint Details

StormPRO® and SewerPRO® pipes have a simple and effective rubber ring joint system which is easy to assemble, leaktight and protects against tree root intrusion.

Vinidex PRO2 is a new jointing system designed for easier installation and leak tight joint performance. The PRO2 joint design uses a new redesigned rubber ring to match new socket geometry. Ensure that only PRO2 rubber rings are used with PRO2 sockets. PRO2 sockets can be identified by a label on the socket and PRO2 rubber rings can be identified by PRO2 marking on the ring.

For DN150 to DN600 pipes, the rubber ring is located on the spigot in the last valley between the corrugations.

For DN750 and DN900 pipes, two rings are used and are located in the first two valleys. The ring in the first valley is the sealing ring whereas the second ring is a mechanical support ring which has the dual benefit of providing redundant sealing capacity.

The Figure below shows the joint details in cross section.

For sizes DN150 to DN600, the pipe can be cut to length, as required, anywhere along the barrel and the same jointing system used.

The spigot ends on pipe sizes DN750 and DN900 are geometrically different to the main pipe barrel. Where these pipe sizes need to be cut to length, couplings must be used for jointing. This system is suitable for occasional use but is not recommended for routine jointing. If many shorter pipe lengths are required, contact Vinidex to discuss an alternative solution.

No chamfer is required.

Jointing Procedure

The following procedure is recommended when jointing StormPRO and SewerPRO rubber ring jointed pipes

Step 1

Clean the pipe socket and spigot end, making sure both are free of any dirt and grit. Any foreign matter trapped in the joint will compromise joint integrity and leaktightness of the system

Step 2

For DN 150 – DN600 – Install the rubber ring by stretching it over the spigot so that it seats between the first and second corrugations from pipe spigot end.
For DN750 and DN900 pipes – Install two rubber rings, one in the valley between the first and second corrugations and one in the adjacent valley between the second and third corrugations from the spigot end.

Step 3

Ensure rubber rings are evenly fitted by running fingers around the full circumference of the pipe

Step 4

Apply a generous quantity of Vinidex jointing lubricant to the inside of the receiving socket. Do not lubricate the rubber ring or the valley under the rubber ring.This will ensure that the ring does not pick up dirt and introduce contaminants to the joint or become displaced during
jointing.

HINT: To further minimize the risk of introducing grit from the embedment material into the joint, a small piece of rubber mat, poly tarp or equivalent can be temporarily placed under the socket/spigot during joint assembly.

Step 5

Insert the leading edge of the spigot into the receiving socket. It is essential that pipes are in a straight line before attempting to make the joint. Double check that the ring and spigot is free from any grit or embedment material so as not to compromise the joint.

Step 6

Do not apply jointing force directly to the socket. Insert a short stub of pipe in the opposite socket. The short stub can be an off-cut, 50mm longer
than the socket, and can be re-used.

Step 7

Apply even jointing force. Subject to pipe diameter and local conditions, use a crowbar to push on a timber block on the end of the stub pipe.

Step 8

Push home the pipe until the spigot end comes into contact with the inner wall of the socket.

NOTE:

The jointing force required increases with the nominal diameter of the pipe. A leverage tool such as a crowbar is generally sufficient for StormPRO and SewerPRO pipes up to 375mm nominal diameter. For larger sizes, mechanical assistance is required. Where applying a jointing force is not practical, consideration should be given to the use of come-along or winch and rope devices.

Angular Deflection

The pipe may be deflected at the joint after jointing has been completed. Any deflection should be limited to a maximum of 1º.

Witness Mark

The rubber ring is held in position by the corrugations on the outer wall of the pipe. When the joint is assembled, the inner walls of the pipe butt together so it is not necessary to joint to a witness mark in the same way as it is for pipe joints designed with a laying gap. However, if required as a visual indication of correct jointing depth, a witness mark can be applied to the spigot end. Depending on manufacturing tolerances, a witness mark on the crest of the 5th rib for sizes DN150 to DN300 and on the crest of the 4th rib for sizes DN375 to DN900 will be either wholly within the socket, or just visible at the mouth at the completion of jointing.

Internal Lining

When the StormPRO or SewerPRO pipe is pushed fully home during assembly, the spigot end and the internal lining at the back of the socket are generally in contact. However, due to manufacturing tolerances or where there is angular deflection at the joint, a small gap may sometimes be observed. This has no effect on the sealing capability of the joint.